Note 6 - Derivative Financial Instruments (Tables)

12 Months Ended

Mar. 31, 2025

Notes Tables

Schedule of Derivative Instruments [Table Text Block]

	Asset Derivatives			Liability Derivatives
	Balance Sheet			Balance Sheet
Derivatives not designated as hedging instruments:	Location	Fair Value		Location	Fair Value
Hot-rolled coil steel contracts	Current portion of derivative assets	$	636	Current portion of derivative liability	$	287

	Asset Derivatives			Liability Derivatives
	Balance Sheet			Balance Sheet
Derivatives not designated as hedging instruments:	Location	Fair Value		Location	Fair Value
Hot-rolled coil steel contracts	Current portion of derivative assets	$	74	Current portion of derivative liability	$	1,686

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

			Location of Loss	Pre- Tax
	Pre-Tax Gain (Loss)		Reclassified from	Loss Reclassified from
	Recognized in OCI		AOCI into Net Earnings	AOCI into Net Earnings
For the fiscal year ended March 31, 2024
Hot-rolled coil steel contracts	$	—	Sales	$	(418	)
Total	$	—		$	(418	)

Derivative Instruments, Gain (Loss) [Table Text Block]

		Gain Recognized in Earnings
	Location of Gain	for Fiscal Year Ended
	Recognized in Earnings	March 31, 2025
Hot-rolled coil steel contracts	Gain on economic hedges of risk	$	7,598

		Gain Recognized in Earnings
	Location of Gain	for Fiscal Year Ended
	Recognized in Earnings	March 31, 2024
Hot-rolled coil steel contracts	Gain on economic hedges of risk	$	1,848

Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]

Notes Tables

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Gain (Loss) on
	Derivatives
Balance at March 31, 2023		(317	)
Other comprehensive loss, net of income, before reclassification		—
Total loss reclassified from AOCI (1)		317
Net current period other comprehensive income		317
Balance at March 31, 2024	$	—